Effect of superfine powder and aqueous extract of Polygonati Rhizoma on rats with natural perimenopausal syndrome / 中国中药杂志

This study aims to examine the effect of superfine powder and aqueous extract of Polygonati Rhizomaon on natural perimenopausal syndrome in rats and explore the underlying mechanism. To be specific, a total of 60 female SD rats(14-15 months old) with estrous cycle disorder were screened by the vaginal smear and randomized into model control group, β-estradiol 3-benzoate group(0.1 mg·kg~(-1)), superfine powder of Polygonati Rhizoma group(0.25, 0.5 g·kg~(-1)) and aqueous extract of Polygonati Rhizoma group(0.25, 0.5 g·kg~(-1)), and another 10 female SD rats(14-15 months old) were selected as the youth control group. The administration lasted 6 weeks. Then the perimenopausal syndrome-related indexes such as body temperature, microcirculatory blood flow of face and ear, vertigo period, salivary secretion, grip force, and bone strength were determined and open field test was conducted. The immune system-related indexes such as the wet weight and index of thymus and spleen, percentage of T lymphocytes and subgroups in peripheral blood, and hematological indexes were measured. In addition, the ovary-related indexes such as estrous cycle, the wet weight and index of uterus and ovary, ovarian tissue morphology, and cell apoptosis were determined. Moreover, hypothalamus-pituitary-ovary axis(HPO)-related indexes such as serum sex hormone levels, cytochrome P450 family 11 subfamily A member 1(CYP11A1), cytochrome P450 family 19 subfamily A member 1(CYP19A1), and cytochrome P450 family 17 subfamily A member 1(P450 17A1) in ovarian tissue were measured. The results showed that the superfine powder and aqueous extract of Polygonati Rhizoma significantly decreased body temperature(anal, facial and dorsal temperature), microcirculatory blood flow in the ear, and vertigo period, increased salivary secretion, grip force, bone strength, total distance and total speed in the open field test, wet weight and index of thymus and spleen, lymphocyte ratio, CD3~+ level, and CD4~+/CD8~+ ratio, reduced neutrophil number and ratio, estrous cycle disorder ratio, and number of ovarian apoptotic cells, raised wet weight and index of uterus, wet weight of ovary, levels of inhibin B(INHB), estradiol(E_2), anti-müllerian hormone(AMH), and ovarian CYP11A1 and CYP19A1, decreased follicle-stimulating hormone(FSH) and luteinizing hormone(LH) content, and improved ovarian tissue morphology. It is suggested that the superfine powder and aqueous extract of Polygonati Rhizoma can improve the symptoms associated with natural perimenopausal syndrome in rats and enhance ovarian function and immune function. The mechanism is that they regulate HPO axis function by increasing estrogen synthesis.

Design and Realization of Contrast Medium Biphasic Hyperbaric Injector / 中国医疗器械杂志

A biphasic hyperbaric injector based on BLDC is designed for alternate and mixed injection of contrast medium and normal saline in the process of contrast medium injection in hospital. The driver hardware and algorithm are optimized especially for high-pressure and high-speed injection requirements. The interface APP is designed with parameter-input and real-time pressure-plotting of injector's ports as two main functions. The whole device can realize the preset function and has high stability after testing.

MicroRNA-141-3p expression in serum of patients with cerebral hemorrhage and its mechanism / 解剖学报

Objective To analyze the expression level of microRNA-141-3p (miR-141-3) in patients with intracerebral hemorrhage (ICH), and explore the effect and mechanism of miR-141-3p on cerebral hemorrhage injury in rats. Methods Forty patients with ICH and 40 healthy controls in total were enrolled in this study. The expression of miR- 141-3p in peripheral blood serum was determined by the Real-time PCR method. The target relationship between miR-141- 3p and NOD-like receptor 3 (NLRP3) 3′ UTR was confirmed by dual luciferase reporter assay. miR-141-3p agonist and agonist NC were injected into rats via the lateral ventricle, respectively. On day 7 after treatment, the neurological function score was evaluated, and then all rats were killed to obtain brain tissue. Brain water content was examined by the dried and wet mass. HE staining was conducted to observe the pathological changes of cerebral tissue. The mRNA expressions of NLRP3 and miR-141-3p were detected by Real-time PCR. The protein expression of interleukin (IL)-lβ, IL-6 and IL-18 were detected by Western blotting analysis. Results The expression of miR-141-3p in serum of ICH patients was significantly down-regulated compared to healthy controls and negatively correlated with the severity of edema around the hematoma [(0.068±0.038) vs (0.520±0.028), t = 15.93, P<0.001; r =-0.8948, -0.9434 to-0.8087, P<0.001 ]. The result of luciferase reporter assay showed that miR-141-3p was related to the regulation of NLRP3 gene expression. The relative expression levels of miR-141-3p in agonist group were significantly higher than those in the agonist NC group (P< 0.001), while the expression levels of NLRP3, IL-lβ, IL-6 and IL-18 were significantly lower than those in the agonist NC group (P< 0.001). Compared with the agonist NC group, the cerebral water content reduced significantly (P< 0.001), and the neurological function score was significantly improved on the day 7 after treatment in agonist group (P< 0.001). The result of HE staining showed that injection of miR-141-3p in ICH rats could reduced the severity of edema around the hematoma. Conclusion MiR-141-3p alleviates ICH-induced inflammatory injury in rat possibly by modulating miR-141-3p.

Laparoscopic side-to-side jejunoileal anastomosis for the treatment of non-obese type 2 diabetes mellitus / 中华普通外科杂志

Objective:To analyze the feasibility, safety and clinical efficacy of laparoscopic side-to-side jejunoileal anastomosis in the treatment of non-obese type 2 diabetes patients (BMI≤32.5 kg/m 2). Methods:The clinical data of 135 patients who underwent laparoscopic side-to-side jejunoileal anastomosis at our hospital from Jan 2018 to Oct 2018 were retrospectively analyzed. They were followed up for 12 months until the end of Oct 2019. SPSS software was used to compare patients′ fasting blood glucose, glycosylated hemoglobin, c-peptide, insulin, body weight, BMI with the values after 12 months of the surgery, and then evaluate factors affecting the prognosis.Results:135 patients successfully completed laparoscopic side-to-side jejunoileal anastomosis without conversion to open surgery. After 12 months of the operation, the patients′ fasting blood glucose was (5.80±0.18)mmol/L, glycosylated hemoglobin was 5.9%±0.4%, fasting c-peptide was(1.32±0.21) nmol/L, and fasting insulin was (42±54) mU/L ( t=10.654, 12.657, 11.214, 10.698, all P<0.05). The body weight was (72.4±9.9)kg, BMI was( 25.6±2.8)kg/m 2, and the difference was not statistically significant ( t=7.658, 6.958, P>0.05). In patients with preoperative glycosylated hemoglobin controlled below 8% and the duration of T2DM less than 10 years, the chances being cured was better than that of those with glycosylated hemoglobin>8% and the medical history >10 years. Conclusion:Laparoscopic side-to-side jejunoileal anastomosis in the treatment of non-obese type 2 diabetes is effective, safe and reliable.

Influence of vancomycin on inflammatory factor and PCT in elderly patients with heart failure combined with pulmonary infection / 药物评价研究

Objective To investigate the influence of vancomycin on inflammatory factor and PCT in elderly patients with heart failure combined with pulmonary infection.Methods 64 cases with heart failure combined with pulmonary infection from Jan.2015 to Dec.2016 in our hospital were chosen,who were randomly divided into two groups,who were taken with cephalosporin and vancomycin,the clinical efficacy of two groups after treatment were compared,the BNP,inflammatory factor and PCT level before and after treatment of two groups were compared.Results The total effective rate of vancomycin group was 84.37％,which was significantly higher than that of ceftazidime group,and the difference was statistically significant (P ＜ 0.05).After treatment,the BNP,TNF-a,IL-6,PCT were significantly reduced in the two groups,and the difference was statistically significant (P ＜ 0.05).And the BNP,TNF-a,IL-6,PCT of vancomycin group was decreased more significantly,the difference between the two groups was statistically significant (P ＜ 0.05).Conclusion Vancomycin had great antibacterial action,which had great efficacy in treatment of heart failure combined with pulmonary infection patients.

Establishment of HPLC fingerprints of Zhihuang Tongfeng Decoction and determination of four constituents / 中成药

AIM To establish HPLC fingerprints of Zhihuang Tongfeng Decoction (Phellodendri chinensis Cortex,Anemarrhenae Rhizoma,Plantaginis Semen,etc.) and to determine the contents of four constituents.METHODS The analysis of aqueous extract of this drug was performed on a 30 ℃ thermostatic Wondasil C18 column (4.6 mm ×250 mm,5 μm),with the mobile phase comprising of acetonitrile-0.5％ acetic acid in a gradient elution manner,and the detection wavelength was set at 245 nm.RESULTS There were sixteen common peaks in the HPLC fingerprints of ten batches of samples with the similarities of more than 0.9.Berberine hydrochloride,mangiferin,geniposidic acid and salvianolic acid B showed good linear relationships within the ranges of 0.636 2-3.575 μg (R2 =0.9999),0.338-1.425 μg (R2 =0.9990),0.6452-2.7188 μg (R2 =1) and0.938 8-5.275 μg (R2 =0.999 3),whose average recoveries were 100.56％,98.35％,100.25％ and 102.11％ with the RSDs of 2.41％,1.17％,1.24％ and 2.02％,respectively.CONCLUSION This accurate,reliable and specific method can be used for the quality control of Zhihuang Tongfeng Decoction.

Establishment of HPLC fingerprints of Zhihuang Tongfeng Decoction and determination of four constituents / 中成药

AIM To establish HPLC fingerprints of Zhihuang Tongfeng Decoction (Phellodendri chinensis Cortex,Anemarrhenae Rhizoma,Plantaginis Semen,etc.) and to determine the contents of four constituents.METHODS The analysis of aqueous extract of this drug was performed on a 30 ℃ thermostatic Wondasil C18 column (4.6 mm ×250 mm,5 μm),with the mobile phase comprising of acetonitrile-0.5％ acetic acid in a gradient elution manner,and the detection wavelength was set at 245 nm.RESULTS There were sixteen common peaks in the HPLC fingerprints of ten batches of samples with the similarities of more than 0.9.Berberine hydrochloride,mangiferin,geniposidic acid and salvianolic acid B showed good linear relationships within the ranges of 0.636 2-3.575 μg (R2 =0.9999),0.338-1.425 μg (R2 =0.9990),0.6452-2.7188 μg (R2 =1) and0.938 8-5.275 μg (R2 =0.999 3),whose average recoveries were 100.56％,98.35％,100.25％ and 102.11％ with the RSDs of 2.41％,1.17％,1.24％ and 2.02％,respectively.CONCLUSION This accurate,reliable and specific method can be used for the quality control of Zhihuang Tongfeng Decoction.

Association of von Willebrand factor gene polymorphisms with coronary artery disease among ethnic southern Han Chinese / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To assess the association of rs216293 T/G and rs1063857 T/C polymorphisms of von Willebrand factor (vWF) gene with the morbidity of coronary artery disease (CAD) and the number of involved vessels among an ethnic Han Chinese population from Zhejiang province.</p><p><b>METHODS</b>A case-control study was conducted. For 246 patients and 156 unaffected controls, the frequencies of genotypes and alleles of the rs216293T/G and rs1063857T/C polymorphisms were determined, and their association with CAD and the numbers of involved vessels were assessed.</p><p><b>RESULTS</b>The frequencies of G allele of rs216293 and C allele of rs1063857 were higher in the CAD patients compared with those of the controls (30.3% vs.23.7%, chi-square=4.107, P=0.043; 7.7% vs. 4.2%, chi-square=4.066, P=0.044). The G allele of the rs216293 polymorphism and C allele of the rs1063857 polymorphism were both higher in the CAD patients compared with the controls (53.7% vs.41.0%, chi-square=6.098, P=0.014; 15.4% vs. 8.3%, chi-square=4.361, P=0.037). After adjusting the influence factors by logistic regression analysis, the G allele carriers of rs216293 and the C allele carriers of rs1063857 showed an increased risk for CAD (OR=1.625, 95%CI: 1.060-2.492, P=0.026; OR=2.305, 95% CI: 1.142-4.654, P=0.040). No significant difference was detected in the frequency of both rs216293 and rs1063857 among patients with single or multiple vessels (P>0.05).</p><p><b>CONCLUSION</b>The rs216293T/G and rs1063857T/C polymorphisms of the vWF gene are both associated with the risk for CAD among the selected population. The G allele of the rs216293 polymorphism and C allele of the rs1063857 polymorphism may be the genetic determinants for CAD.</p>

Cryobiological Characteristics of L-proline in Mammalian Oocyte Cryopreservation / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>L-proline is a natural, nontoxic cryoprotectant that helps cells and tissues to tolerate freezing in a variety of plants and animals. The use of L-proline in mammalian oocyte cryopreservation is rare. In this study, we explored the cryobiological characteristics of L-proline and evaluated its protective effect in mouse oocyte cryopreservation.</p><p><b>METHODS</b>The freezing property of L-proline was detected by Raman spectroscopy and osmometer. Mature oocytes obtained from 8-week-old B6D2F1 mice were vitrified in a solution consisting various concentration of L-proline with a reduced proportion of dimethyl sulfoxide (DMSO) and ethylene glycol (EG), comparing with the control group (15% DMSO and 15% EG without L-proline). The survival rate, 5-methylcytosine (5-mC) expression, fertilization rate, two-cell rate, and blastocyst rate in vitro were assessed by immunofluorescence and in vitro fertilization. Data were analyzed by Chi-square test.</p><p><b>RESULTS</b>L-proline can penetrate the oocyte membrane within 1 min. The osmotic pressure of 2.00 mol/L L-proline mixture is similar to that of the control group. The survival rate of the postthawed oocyte in 2.00 mol/L L-proline combining 7.5% DMSO and 10% EG is significantly higher than that of the control group. There is no difference of 5-mC expression between the L-proline combination groups and control. The fertilization rate, two-cell rate, and blastocyst rate in vitro from oocyte vitrified in 2.00 mol/L L-proline combining 7.5% DMSO and 10% EG solution are similar to that of control.</p><p><b>CONCLUSIONS</b>It indicated that an appropriate concentration of L-proline can improve the cryopreservation efficiency of mouse oocytes with low concentrations of DMSO and EG, which may be applicable to human oocyte vitrification.</p>

Equipment department management information system based on B/S architecture:consumables supermarket management / 医疗卫生装备

To establish a consumables supermarket management system to realize the informatized management of the consumables supermarket. The system used SOA as the main architecture, and IIS manager as the pub-lishing tool. The system had the workload, materials and financial resources decreased while the efficiency in-creased, and made the supervisor master the sale information timely. Consumables supermarket informatized management may decrease the hospital's needs for current capital as well as the links, while increase the hospital effi-ciency greatly.

One-stage endoscopic sphincterotomy plus laparoscopic cholecystectomy for the treatment of cholecysto-choledocolithiasis / 中华普通外科杂志

Objective To evaluate the safety and efficacy of one-stage endoscopic sphincterotomy plus laparoscopic cholecystectomy for the treatment of patients who have concurrent gallstones and CBD stones.Methods We conducted a prospective study from Mar 2008 to Nov 2011 in our department.A total of 63 consecutive patients of concurrent gallstones and CBD stones were included and divided into two groups:31 patients in test group first underwent ERCP and EST to remove CBD stones,and then during the same general anesthesia underwent laparoscopic cholecystectomy (LC) ; while 32 patients in control group first underwent ERCP and ES,and then LC 3-5 days later.Results The stone clearance rate in test group and control group were 96.9％ and 96.7％ (P ＞ 0.05),respectively.The postoperative lung infection rate in the test group and the control group were 7.1％ and 16.1％ (P ＜0.05),respectively.The length of hospital stay (LOS) of the two groups was (7.5 ± 1.7) days and (12.6 ±2.5) days,respectively (P ＜ 0.05).The total expense of hospitalization was (￥) (2 356 ± 126) and (￥) (37 056 ± 152),respectively (P ＜ 0.05).Conclusions One-stage laparoendoscopic management of patients with concurrent gallstones and CBD stones is safe,effective and more economic approach than two-stage treatment for patients suffering from concurrent gall stone and choledocholithiasis.

Equipment department management information system based on B/S architecture:purchase process management / 医疗卫生装备

Objective To develop an equipment purchase process management module based on B/S architecture to standardize hospital equipment purchase process and promote hospital informatization. Methods Service-oriented architecture (SOA) was adopted as the main architecture, and internet information service (IIS) manager was used as the publishing tool.Results All the departments could visit the system through hospital intranet and perform on-line equipment purchase and inquiry for progress.Conclusion The system facilitates the inquiry of all departments for the progress of equipment purchase, and standardizes and optimizes the equipment purchase process.

Identification and characterization of partner proteins interacting with fatty acid activation enzyme Slr1609 in Synechocystis sp. PCC 6803 / 生物工程学报

To understand molecular modules related to polyunsaturated fatty acids (PUFA) synthesis and eventually produce PUFA at high efficiency, we developed a protein complex analysis technology in Synechocystis sp. PCC 6803, and applied it to identify possible partner proteins interacting with the key enzymes that catalyze PUFA biosynthesis. We first constructed a recombinant expression of protein of slr1609 encoding the fatty acid activation enzyme, by fusing 3xFLAG tag with the target protein. Then we verified its expression by Western blotting targeting 3xFLAG tag. To maximize purification of Slr1609 protein complex, we optimized the protein expression conditions of Slr1609 in Synechocystis in a 5 L fermenter by monitoring its gene expression using RT-qPCR. The purification of the Slr1609 protein complexes was demonstrated by a Native-PAGE analysis. Finally, LC-MS/MS proteomic analysis allowed identification of the possible partner proteins interacting with Slr1609.

Improved anti-tumor efficiency against prostate cancer by docetaxel-loaded PEG-PCL micelles / 华中科技大学学报（医学）（英德文版）

This study primarily focused on the systematic assessment of both in vitro and in vivo anti-tumor effects of docetaxel-loaded polyethylene glycol (PEG)2000-polycaprolactone (PCL)2600 micelles on hormone-refractory prostate cancer (HRPC). By using solvent evaporation method, PEG-PCL was chosen to prepare doxetaxel (DTX)-loaded mPEG-PCL micelles (DTX-PMs), with the purpose of eliminating side effects of the commercial formulation (Tween 80) and prolonging the blood circulation time. The prepared DTX-PMs had an average particle size of 25.19±2.36 nm, a zeta potential of 0.64±0.15 mV, a polydispersity index of 0.56±0.03, a drug loading of (8.72±1.05)%, and an encapsulation efficiency of (98.1±8.4)%. In vitro cytotoxicity studies indicated that DTX-PMs could effectively kill LNCap-C4-2B cells and show a dose- and time-dependent efficacy. The hemolysis test showed that DTX-PMs had less hemocytolysis than the commercial product of Duopafei®. A sustained in vitro release behavior and prolonged circulation time in blood vessels were observed in the DTX-PMs. Furthermore, when compared with Duopafei®, the DTX-PMs dramatically reduced the prostate specific antigen (PSA) level and tumor growth of prostate tumor-bearing nude mice in vivo. In conclusion, the DTX-PMs can lower systemic side effects, improve anti-tumor activity with prolonged blood circulation time, and will bring an alternative to patients with HRPC.

Flow Starting Point and Voiding Mechanisms Measured by Simultaneous Registrations of Intravesical, Intra-abdominal, and Intraurethral Pressures in Awake Rats / 대한배뇨장애요실금학회지

PURPOSE: The aim of this study was to apply a new surgical procedure that allows for the successful monitoring of intraurethral pressure (IUP) changes in the cystometry of awake Sprague-Dawley rats. METHODS: Twenty-six female Sprague-Dawley rats were grouped according to the catheterization method (bladder only; bladder and urethra; or bladder, urethra, and abdomen). Using an arbitrarily determined initial point of the first phase among four rat micturition phases on the simultaneous curves as a reference point, we compared the time differences to the points on an intravesical pressure (IVP) and those on IUP or a detrusor pressure (DP) curve from intra-abdominal pressure (IAP). RESULTS: In awake rat, the start of urethral flow on IUP curve corresponded to the initial point of the second phase, which is same to the results on the anesthetized rat. However, certain results, such as micturition pressure (MP) and intraluminal pressure high-frequency oscillations (IPHFOs), differed between awake and anesthetized rats. Most MP values were checked after the end of urethral flow on the IUP curve, which is due to the peculiar methodology such as transvesical catheterization. Urethral flow was not completely interrupted during the IPHFOs, which suggests the presence of urethral wall tension against the flow during voiding. After removal of the superimposed effects of IAP from IVP, the DP curve clearly showed a peculiar shape, highlighting the possibility of using IAP in place of IUP to detect the flow starting point on the IVP curve. CONCLUSIONS: Awake rat cystometry results have been interpreted based on those in anesthetized rats. However, our awake cystometry data were substantially different in terms of voiding time compared to those of anesthetized rats. This discovery warrants careful interpretation of the voiding parameters in awake rat cystometry.

Improved anti-tumor efficiency against prostate cancer by docetaxel-loaded PEG-PCL micelles / 华中科技大学学报（医学）（英德文版）

This study primarily focused on the systematic assessment of both in vitro and in vivo anti-tumor effects of docetaxel-loaded polyethylene glycol (PEG)2000-polycaprolactone (PCL)2600 micelles on hormone-refractory prostate cancer (HRPC). By using solvent evaporation method, PEG-PCL was chosen to prepare doxetaxel (DTX)-loaded mPEG-PCL micelles (DTX-PMs), with the purpose of eliminating side effects of the commercial formulation (Tween 80) and prolonging the blood circulation time. The prepared DTX-PMs had an average particle size of 25.19±2.36 nm, a zeta potential of 0.64±0.15 mV, a polydispersity index of 0.56±0.03, a drug loading of (8.72±1.05)%, and an encapsulation efficiency of (98.1±8.4)%. In vitro cytotoxicity studies indicated that DTX-PMs could effectively kill LNCap-C4-2B cells and show a dose- and time-dependent efficacy. The hemolysis test showed that DTX-PMs had less hemocytolysis than the commercial product of Duopafei®. A sustained in vitro release behavior and prolonged circulation time in blood vessels were observed in the DTX-PMs. Furthermore, when compared with Duopafei®, the DTX-PMs dramatically reduced the prostate specific antigen (PSA) level and tumor growth of prostate tumor-bearing nude mice in vivo. In conclusion, the DTX-PMs can lower systemic side effects, improve anti-tumor activity with prolonged blood circulation time, and will bring an alternative to patients with HRPC.

Research on the common troubles and basic principle of TCL-II injection pump / 中国医学装备

To introduce the basic working principle of TCL - II medical injection pump, the detailed description of the power circuit and motor drive circuit. According to the basic principle of each function, it gave the corresponding circuit diagram for peer reference. Injection pump in the maintenance can use this typical working principle and the typical electronic circuit to realize the common troubleshooting quickly and accurately.

Association of interleukin 10 gene -592C/A polymorphism with coronary artery disease / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To assess the association of interleukin 10 (IL10) gene -592C/A polymorphism with morbidity of coronary heart disease in a southern Chinese Han population.</p><p><b>METHODS</b>Frequencies of various genotypes and alleles for the IL10 -592C/A polymorphism (rs1800872) were determined by the means of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) in 249 patients and 132 unaffected controls.</p><p><b>RESULTS</b>The frequencies of both IL10 -592C/A site and different alleles have reached statistical significance (P<0.05) after correcting the difference in clinical data by logistic regression analysis. The risk of coronary heart disease in the patients with A gene (AA+CA) was 2.449 times greater than those without (95%CI:1.214-4.940, P=0.012).</p><p><b>CONCLUSION</b>IL10 gene -592C/A polymorphism is associated with the risk of coronary heart disease. Allele A may be a risk factor for this disease in the studied population.</p>

Enhanced porcine interferon-alpha production by Pichia pastoris by methanol/sorbitol co-feeding and energy metabolism shift / 生物工程学报

Porcine interferon-alpha (pIFN-alpha) fermentative production by recombinant Pichia pastoris was carried out in a 10-L bioreactor to study its metabolism changes and effects on fermentation under different inducing strategies, by analyzing the change patterns of the corresponding metabolism and energy regeneration. The results show that the specific activities of alcohol oxidase (AOX), formaldehyde dehydrogenase (FLD) and formate dehydrogenase (FDH) largely increased when reducing temperature from 30 degrees C to 20 degrees C under pure methanol induction, leading significant enhancements in methanol metabolism, formaldehyde dissimilatory energy metabolism and pIFN-alpha antiviral activity. The highest pIFN-alpha antiviral activity reached 1.4 x 10(6) IU/mL, which was about 10-folds of that obtained under 30 degrees C induction. Using methanol/sorbitol co-feeding strategy at 30 degrees C, the major energy metabolism energizing pIFN-alpha synthesis shifted from formaldehyde dissimilatory energy metabolism pathway to TCA cycle, formaldehyde dissimilatory pathway was weakened and accumulation of toxic intermediate metabolite-formaldehyde was relieved, and methanol flux distribution towards to pIFN-alpha synthesis was enhanced. Under this condition, the highest pIFN-alpha antiviral activity reached 1.8 x 10(7) IU/mL which was about 100-folds of that obtained under pure methanol induction at 30 degrees C. More important, enhanced pIFN-alpha production with methanol/sorbitol co-feeding strategy could be implemented under mild conditions, which greatly reduced the fermentation costs and improved the entire fermentation performance.

MRS and diffusion tensor image in mild traumatic brain injuries

OBJECTIVE@#To analyze characters of magnetic resonance spectroscopy (MRS) and diffusion tensor imaging (DTI) in the diagnosis of mild trauma brain injuries (MTBI) in frontal lobe and to compare with conventional magnetic resonance imaging (MRI).@*METHODS@#A total of 21 patients were selected, who all aged 12-51 years old and had injury within 24 hours. Computer tomography (CT) and the Glasgow Coma Scale were used to evaluate the degree of injury. All patients were diagnosed as MTBI, and 19 had conventional MRI, MRS and DTI. The major parameters of MRS were Probe-P sequence, TE = 144 or 35 ms, and both single voxel spectrum and chemical shift imging were included. The major parameters of DTI were diffusion directions =15, b value = 1 000 s/mm(2). Frational anisotropic (FA) map and average ADC map were obtained to evaluate DTI result. Positive detetion ratio was observed and the imaging changes were compared between injured side and normal side.@*RESULTS@#All 21 patients had CT scan and Glasgow scale. A total of 19 patients had conventional MRI, DTI and MRS. Results of CT and conventional MRI showed no significant abnormality in lobe, and Glasgow scale showed mild type. MRS result showed significant decrease in N-acetyl aspartate (NAA) and NAA/creatine (Cr) in 13 cases (68.4%) (P<0.001), and increase in lactic acid (Lac) in 7 cases (36.8%). FA mapping of the frontal lobe displayed significant changes in 7 cases (36.8%), with 5 out of the 7 cases having increase in FA value. And there was no significant difference in average ADC.@*CONCLUSIONS@#MRS and DTI might be more sensible than other methods, such as CT and conventional MRI in diagnosis of MTBI. The particular changes were reduced NAA and increased Lac for MRS, and increased FA values for DTI.